Machine for grooving grinding-cylinders



(No Model.)

2 Sheets-Sheet 1. P. T. SMITH.

MACHINE FOR GROOVING GRINDING CYLINDERS. No. 328,075.

Patented Oct. 13, 1885.

IIILIIIIIIIIIII m'inesaes:

(No Model.) 2 Sheets-Sheet 2.

P. T. SMITH.

MAGHINE FOR GROOVING GRINDING GYLINDERS. No. 328,075.

Patented 001:; I3, 1885.

mfnessea' 11 109215021 M Q; W

' Jiiarfieya- UNITED STATES T PATENT OFFICE.

PETER T. SMITH, OF MILWVAUKEE, WISCONSIN.

MACHlNbE FOR GROOVING GRlNDlNG-CYLlNDERS.

SPECIFICATION forming part of Letters Patent No. 328,075, dated October 13,1885.

Application filed Deember 21, 1882. Serial No. 79,810. I (No model.)

To all whom it may concern:

Be it known that I, PETER '1. SMITH, of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new anduseful Improvements in Machines for Cutting Spiral Grooves in Grinding'Rolls; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to devices for grooving grinding-rolls, and will be fully described hereinafter.

In the drawings, Figure 1 is a side elevation of my device. Fig. 2 is a top or plan view; Fig. 3, a broken section through dotted line 3 3 Fig. 1; and Figs. 4, 5, 6, and 7 details.

A is the frame of my machine, which, of course, is stationary.

B is the bed, which is adapted for reciprocation in the direction of its length.

B is a large gear-wheel, which is keyed to the driving-shaft G in position for its teeth to engage with a rack, b, on the under side of the bed B. The shaft 0 has its bearings in the walls of the frame A, and is operated by any system of belting and pulleys that can be made to reverse its motion periodically, so that after the bed has been carried in one direction as far as the length of the roll being operated upon it will be returned to its starting-point.

(J is a gear-wheel, which fits loosely on a projecting end of the shaft 0 on the working side of the frame, and to the face of the gearwheel 0, I attach a flange, D, in which are two or more series of perforations. I have shown three series, numbered, respectively, 1,2,3. The end of the shaft 0 is hollow, and beyond the hub of wheel 0 is slotted, as at G, and over this end of the shaft I slip a cupwheel, D, having a hub that is slotted,to permit the vertical arm of a bell-crank lever, 11, that is pivoted therein to project down into the end of the shaft, and into a slot in a bolt, 0, that slides in the bore of the shaft 0, while the horizontal arm of this lever projects into a slot in the lower end of a bolt, d, that slides in a partition, (1 in the cup-wheel.

E is an adjustable bracket that extends down from the bed, and the free end of which is on the same plane as the center of shaft 0,

and this end of the bracket is slotted to re ceive a trigger, f, that is pivoted therein. The outer end of this trigger terminates in a spring, f, and its inner end is beveled to correspond with the projecting end of bolt 6.

F is a stop-rod that projects from a portion of the frame in position to strike the spring f when the bed has about completed its forward travel.

G is a stud that projects from the side of frame A to receive the hub of a worm-wheel, 0, and on a sleeve that projects inwardly from this huh I key a pinion, c, that meshes with the teeth of the gear-wheel O, and imparts its motion to a large worm, G, that is keyed on: the shaft H of a gear-cylinder, H. The bearings of. the cylinder are bolted solidly to the main frame of the machine, and the teeth of this cylinder,by engagement with the gearwheel J on the chuck-shaft that carries the roller that is being treated, impart to it the necessary rotation to give the proper throw to the spirals as they are out. The bolt d is held out so that its head bears against the inner periphery of the flange D of wheel 0 by a spring, d and that I may adjust the stud that engages with the perforations 1 2 3 to take into either of the series, Ifix it in a base, d, that is dovetailed to fit into a dovetailed block, d on the outer end of the bolt. I pass a tightening-screw up through the under side of this block to hold the base in adjustment. In Figs. 1 and 3 I have shown the bolt d as perforated atits outer end to take studs that are passed through the perforations in the flange of wheel 0, as it is a mere matter of choice whether the bolt is provided with studs that enter perforations in the flange, or the flange be provided with studs that enter the head of the bolt.

The operation of my device is as follows: In Fig. 1 I have shown the position of the parts just after a groove has'been cut, before thebolts (not shown) are shifted to reverse the direction of wheel B. The bed B will now travel in the direction of the arrow until the stop F strikes the spring-extension f of the trigger f and throws it into the position shown in dotted lines, Fig. 6, when it will be ready for action. Now the wheel B begins to return the bed for another out, and as the bracket E passes the wheel D its trigger striking bolt e forces it in, and causes the bell-cranklever d to jog the bolt 11 down and release rim D of wheel 0, so that the wheel D may turn without turning the wheel O;but as the trigger only presses the bolt e in momentarily, the bell-crank permits the bolt d to take into the very next perforation, and therefore the wheel D only moves independently a distance equal to that between two perforations; but this interval is sufficient to hold the roller as the bed returns, so that it will stop with the roller in position to bring a new land under the tool, and then the stud d, taking into a new perforation, will again connect the flange D with the shaft 0 to continue the rotation of the wheel 0 and through it the roller. In other words, the length of time between the stopping of the gear-wheel O and its starting again, while the bed is carrying the roller back to its place for a fresh out, determines the distance between the cuts, and thisisregulated by the distance apart that the perforations are placed, and, therefore, I have shown three series with the holes in each series a different distance apart from those in the others, so that I can, by changing the position of the bolt (1 or its stud, change the number of cuts to the inch on the roll, and when the capabilities of this flange are exhausted I can replace it by another flange; or I may use a flange with only one series and change it when 1 want a different out.

It is obvious that by changing the wormwheel from left to right or from right to left I can make either a right or left handed spiral in the roller, or I may separate the gears G and c, and place an intermediate gear-wheel between the two,and by changing the sizes of the gear I may change the relative speed of the cylinder H and that of the reciprocation of the bed to regulate the pitch of the spirals.

It will be seen that one gear-cylinder, H, is long enough to engage with the driving gearwheel H for the full distance that the bed may travel. While I have shown the bracket E and its trigger adjusted to trip the bolts e and d on the return-stroke of the bed, I may adjust them to trip immediately or at any time before it has started on a new out after the tool has finished its out, or at any time after the tool has left the roll on its forward or cutting stroke, so that the new land will be on the opposite side to that of the groove just cut to what it would have been had the trips acted on the return-stroke, as before described. For instance, suppose that the tripping is done, as before described. On the return of the roller, now, the new land will be on this side of the last out, for the trip acts when the roller is turning away from us; but if the tripping is done while the'bed is going forward the roll will be turning toward us and the new land will be on the opposite side of the last out, and this is very important when the grooves out are what are known as saw-teeth or sharp cut, and to provide for this reversed action of the trip I have but to turn the trigger f upside down and make the outer end of bolt 6 of wedge shape.

The advantages derived from making my bracket E adjustable rests in the fact that no matter what the length of the roll I am treating may be, I can adjust the bracket to trip just at the proper time.

What I claim as new, and desire to secure by Letters Patent, is

1. In a machine for grooving mill-rollers, the combination of the gear-wheel 0, running loose upon shaft 0, and provided with the perforated flange D, the cup-wheel D, secured upon said shaft 0 and having the bell-crank pivoted to it, the spring-bolt (1, provided with a pin engaging with holes in flange D, and the trip-bolt E, substantially as described and shown.

2. The combination, with the spring-bolt d, which connects the cup-wheel to the perforated flange on the gear-wheel, of the trip-bolt e, bell-crank lever d, trigger f, bed B, bracket E, and stop F, substantially as shown and described.

3. The combination of the driving-shaft O, gear-wheel B, the bed B, having the rack 12 thereon, the gear-wheel 0', having perforated flange D, the cup-wheel D, having the bellcrank lever pivoted to it, the spring-bolt d, connecting the cup-wheel to the perforated flange, the trip bolt e, trigger f, bracket E, and stop F, substantially as described and shown.

4. The combination of the gear-wheel 0, running loose on the driving-shaft, and provided with the perforated flange D, the cupwheel D, secured upon the said driving-shaft, the bell-crank lever 61, trip-bolt e, spring-bolt d, having the head d provided with a dovetailed slot, and a set-screw, and the dovetailed block d, to which the connectingpin is attached, substantially as described and shown.

5. The-combination of the gear-wheel O, deriving intermittent motion from the main driving-shaft, the pinion c, the worm c, wormwheel G, shaft H, and cylindrical gear H, substantially as described and shown.

6. The combination of the bed B, driven continuously in either direction, the gearwheel J, traveling with the bed, the cylindrical gear H, journaled in brackets attached to the framing of the machine, and driven by a suitable train of gearing by the pinion c, and the wheel 0. gearing into pinion c, and deriving intermittent rotary motion from the same shaft which drives the bed, substan tially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand, on this 17 th day of November, 1882, in the presence of two witnesses.

PETER T. SMITH. Witnesses:

S. S. STOUT, H. G. UNDERWOOD. 

